I watched the whole game, and thought Romeu played very well indeed, really promising. I also thought Cedric was good, although he was better getting forward than defensively. He looked a bit shellshocked after the clattering that left his head bandaged.
As phil mentions above, that assault on Mane was pretty awful. Bad challenge to start with, then gomes came and stuck the boot in, Mane could hardly stand up. How neither of those two got at least a yellow is beyond me. Home decision, I suppose.